Pardon our dust

We're doing a whole bunch of stuff to the ENMTools R package right now.  A lot of it is below the hood (cleaning up dependencies for CRAN and whatnot), but some of it is in service of implementing new functionality.  Anyway, in the process of fixing a few things we also broke a few things, so if you've downloaded ENMTools from the main branch in the past few days you might be having some trouble.  I've fixed the bits that I have found so far, and the new code is now up on the main branch.  We're going to make a real push over the next little while to get some testthat code working and get set up with continuous integration to avoid these mishaps in the future.